Errrm... Somebody, please tell me which side of my head should I use?!! Cuz it seems that I spin (I'm not spinning actaully, just tap

) on the center of my head a lil more to my forehead. I read that I must spin on the center side a lil bit to the back of my skull

. So what should I do?
I think that I'll film myself and see if my neck and spine are straight or not, but any advices on this? In my opinion the main things learning headspins is to be able to headstand comfortably, keep everything straight and know on which part oh your head should you spin. That's just it! Help me, please

.